Drying-oil and process of making same.



HANS REES, or n ssELnonr, GERMANY.

DRYING-011mm rnoonss or MAKING SAME.

No Drawing.

To all whom it may concern:

Be it known that I, HA'Ns REES, citizen of Germany, residing atDusseldorf, Germany, have invented certain new and useful Improvementsin Drying-Oil and Process of Although the thin film then formed may feeldry, the layer is not homogeneous and the difierence between the-dry'linoxyn and the still wet mineral oil is; easily distinguished. Itis possible to separate the mineral oil fromsuchmixture by extraction orcentrifugal action. In mixtures of rapidly dryingve getable oils, suchas varnish, with mineral oils, the latter readily separate andaccumulate on the surface-of the coating, forming a damp greasy layer onthe same. In .all these cases the mineral oil is only apparently dry andthus the mixture of a dry oil or varnish with mineral oil is consideredto deteriorate the quality of the former. very considerably.

The object of the present invention is'not only to avoid the above nameddisadvantages, but also to render the mineral oil actu-' ally capable ofdrying. I attainthis object bymixing mineral oils perfectly freefrom'paraflin, and having a freezing point of about 30 degrees C. and aboiling point of preferably 300 degrees C. to 310 degrees 0., either inhot or cold condition, with a vegetable oil or vegetable oil mixture,thickened either by continuous boiling, by oxidation, or byvulcanization, and then adding drying substances to produce varnish.

Thus, as an example, 100 parts by weight of linseed oil and parts byweight of wood oil are thickened by continuous boiling and, on thecompletion of this process, 500-700 parts by weight of mineral oil freefrom paraflin and having a boiling point of 300310 C. are added. Or 100parts by Weight of linseed-oil and 50 parts by weight of wood oil arethickened at a corresponding temperature by feeding in air or oxygen,and on the completion of the Specification of Letters Patent.

Patented Oct. 17, 1916.

Application filed June 24, 1316. Serial No. 105,687.

process are mixed with 500700 parts by weight of a mineral oil free fromparafiin.

Or again, 100 parts by weight of linseed oil and 50 partsof wood oil arevulcanized at a corresponding temperature with'23% of flower of sulfuror a corresponding quantity of chlorid of sulfur and on completion ofthe process, from 500700 parts by weight of mineral oil free of paraflinare added. Owing to the high boiling point of the mineral o1l, 1 t ispossible to carry out the process descrlbed of thickening the oil, inthe presence of the mineral oil and in this case products richer inquality are obtained. Dry ng substances are added according torequlrements, z. 6. according to the drying properties required of thevarnish to be produced from the mineral oil rendered driable. Thenon-volatile mineral oils of high boil mg point hitherto employed formerely mixlng with varnishes always contained a large amount of paraffinand Were consequently not proof against the cold. It is an importantfeature of the present invention that mineral oils be employed, whichare not only absolutely proof against the cold but also perfectly freefrom paraffin. From 10 to 15% ofparaflin oil thickened 1n the abovedescribed! manner to a kneadable degree will be suflicient to render aperfectly parafiin-free mineral oil capable of being dried to ahomogeneous elastic degree wlthin a normal period of time, which periodmay be reduced to the shortest one of about 7 hours by adding suitabledrying agents. In every case the coating film obtained will be dry tothe touch, and form a homogeneous whole, the individual constituentparts of which cannot be mechanically separated. This constitutes anextraordinary technical efl'ect.

A varnish prepared in the above described manner may consist of from 80to 90% of mineral oil, and will not difi'er from a pure o1l varnish inits technical qualities for painting and varnishing purposes, whilemixtures of linseed oil varnish, with only obj ecfrom this mineral oilthus rendered capable Well suited for making, all kinds of varofrust-proof coatings. Mineral oil, thus rendered capable of drying isparticularly nishes from resins and copals, a purpose for which it hashitherto been impossible to employ mineral oils.

I am aware that the obtaining of mineral Oils of high boiling point andentirely free from paraffin is known; the separation of parafiin frommineral oils containin the same is based on the fact that para n isrendered solid on cooling the mineral oil and is eliminated by beingpressed out. The greater the degree of cold employed, the more easy andmore perfect will be the separation of the paraffin.

I claimasemyinvention i- 7 1. A composition of matter, comprising anadmixture of thickened vegetable oil and a mineral oil having a. boilingpoint of approximately 300 degrees C. and being free of paraflin.

2. A composition of matter, comprising an r mixture of thickenedvegetable oil with a preponderating quantity of a mineral oil having aboiling point of approximately 300 degrees C. and being free of 3. Theherein described process of producing an oil composition, Which consists'in admixing thickened vegetable oil With mineral oil having a boilingpoint of approximately 300 degrees C. and being free of paraffin.

4. The herein described process of pro ducing an. oil composition, whichconsists in admixing vegetable oil With mineral oil having a boilingpoint of approximately 300 degrees C. and being free of paraffin, andthickening such vegetable oil in the presence of the mineral oil.

In testimony whereof I hereunto aflix my signature in the presence oftwo Witnesses.

I HANS REBS.- [11. s.]

-Withesses:

ALBERT NUTFER, HELEN NUFER.

